/usr/share/doc/xshisen/README

Read LICENSE for the license term.
Read INSTALL for the installation.
(INSTALL document is also provided as Japanese translation.
See INSTALL.jp.)

/usr/share/doc/xshisen/README.Debian

Note that in the Debian package of xshisen, support for system-wide score
files is disabled. This was done because xshisen is not written very
securely, and a system-wide score file required the program to be installed
setgid games.